Bobbin whirl gear



Dec. 13, 1949 w. F. LEE ET AL' BoBBIN WHIRL GEAR Filed Aug. 25, 1945 M 3. y m w 6 En c H 1, .01h o J, 5 MU I .M d@ d l 0 2 7 Y 6 f.A L\\ 0;/m P 7 Patented Ecc. i949 UNITED STATE r'i'l'iNT QFFICE BGBBIN WHIRL GEAR Williamv lli. Lee and Joseph B. Allen,

Glendale, S. C.

Application August 25, 1945, Serial No. 612,644

1 Claim.

. porting and driving whirl gears of the roving frames employed in cotton mills.

Briefly and generally stated, the invention has for its primary object to eiect economy of metal by providing a long-lived gear which is made so by employing separable parts, such as the gear teeth per se and others.

More specifically, it is an object of the invention to provide a bobbin whirl gear or the like, having not only a replaceable gear tooth portion but also a replaceable bobbin driving clutch pin.

l-leretofore, one or" the primary objections to bobbin whirl gears has been that they are cast in one piece and the bobbin confining collar has a tendency to break as the result of the combination of strain and heat action. Also, the tubular bearing portion of such gears is oi the same material as the gear and therefore required frequent oiling. Having the foregoing in mind, it is an outstanding aim of the instant invention to incorporate in a bobbin whirl gear or the like a novel sleeve of bearing metal which requires but little oiling and which also has a projecting portion for reception in the medial bearing of a bobbin in lieu of the conventional collar which is integral with the gear and when broken necessitates replacement of the entire bobbin whirl gear structure.

The foregoing and other objects which will be better understood later on, are attained by means of a novel combination and arrangement of parts to be hereinafter described and claimed, reference being had to the accompanying drawing, wherein- Fig. l is an elevational view illustrating the application of our invention to a bobbin whirl gear and showing certain conventional elements immediately associated therewith;

Fig. 2 is a vertical sectional view through said bobbin whirl gear taken on the line 2 2 of Fig. 1;

Fig. 3 is a detailed sectional view illustrating our novel replaceable bobbin clutch pin, the view being taken on the line 3 3 of Fig. 1.

Referring to the drawing by reference characters which have been used to designate the same parts in all views, numeral 5 denotes generally a bobbin whirl gear, a fragment of a bobbin supported thereby being illustrated in dotted lines by numeral 4.

The whirl gear 5 is illustrated as rotatably journalled upon the usual bolster 6 through which f; l I to provide a bobbin confining collar l2a.

extends the conventional spindle I for supporting a ilyer (not shown).

The bolster 6 has a lower portion 5a which supports the drive shaft 8 upon which is keyed the skew bevel gear 9 having driving engagement with the lower gear toothed portion 5a of said bobbin whirl gear 5.

In carrying out the invention, we provide the lower end or" the sleeve portion il of said whirl Q gear with a threaded connection la between it and the removable toothed annulus 5a.

The threads which provide the connection 10a between sleeve i8 and the toothed gear annulus 5a will be either right-hand or left-hand but said threads preferably have such relation to the direction of rotation of the skew bevel gear 9 as to effect a tightening of the toothed annulus 5a on the sleeve iii in the normal operation of the device.

As heretofore intimated, much oi the breakage of bobbin whirl gears, whether it be as to the teeth or the bobbin confining collar, is due to over-heating of the sleeve bearing which surrounds the bolster i. We meet this diiculty by providing a separate bearing sleeve i2 which is insertable into the sleeve portion Iii of said gear and sweated or otherwise retained in place. The upper end of said separate bearing sleeve l2 projects above the circular bobbin supporting ange The separate bearing sleeve i2 will preferably be made of brass or other wear-resisting material, which requires but little oiling and is resistant to heat penetration. Various metal alloys commonly used for bearings may be used to advantage.

Also, the bobbin clutch or drive pins which seat in a recess 'la in the bottom of the bobbin 3, have a tendency to break and we meet this objection to the conventional bobbin whirl gear by providing a removable clutch pin i3 whose shank is threaded into the bobbin supporting flange Ii as illustrated in Figs. l and 3. This removable bobbin clutch pin i3 has a kerf 93a. across its top for the reception of a screw-driver.

The conventional flange i4 surrounds the exterior sleeve portion I@ of the gear as usual to protect the operators fingers against contact with the gears 5c, 9 when he is placing or removing a bobbin f upon the upper circular flange Il.

From the foregoing description, taken in connection with the accompanying drawing, it will be apparent that the mill owner using our bobbin whirl gear will be saved a tremendous amount of expense. If the toothed gear portion 5a breaks or when it becomes worn as it does in service, it can be readily screwed off the sleeve 0 and another gear section 5a put on in its place. If the clutch pin becomes broken, it can be conveniently replaced aiso, and in practice it will probably be desirable that the shank of said clutch pin I3 be smooth so it can be driven out of the aperture in the flange H. Trie dual advantageA or" the separate bearing sleeve I2, 12a. has already been emphasized.

Having thus described our invention, what we claim as new is:

A bobbin-supporting Whirl gear for va. 4cotton Vmill roving frame or the like and comprising a tubular body portion extending from one end, a laterally projecting bobbin-supporting portion at the upper end of said body portion, a bearing sleeve of wear-withstanding material insertable in said tubular body portion and tightly tting therein, said bearing sleeve projecting beyond the plane of said bobbin-supporting portion whereby to provide a bobbin-centering means, and a toothed annular gear portion removably receiving said tubular body portion and secured thereto inwardly of said bobbin-supporting portion. WILLIAM F. LEE. JOSEPH B. ALLEN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 466,263 Scholfleld Dec. 29, 1891 488,681 Scholeld Dec. 27, 1892 488,952 Soholeld Dec. 27, 1892 2,443,597 Carnagua et al. June 22, 1948 2,451,593 Wilson Oct. 19, 1948 FOREIGN PATENTS Number Country Date 1,992 Great Britain July 28, 1871 233,296 Great Britain July 8, 1925 '386,786 lGermany Dec. l5, 1923 

